Castro was acquired from the Astros yesterday after posting a 2.29 ERA in 19 2/3 innings out of the pen at Triple-A Sugar Land. The 10-year major league veteran will be a candidate to handle late leads for the White Sox.

The 30-year-old right-hander had an opt-out clause coming up in his minor league deal, so the Astros decided to flip him someplace where he’ll get an opportunity. He’s expected to join the White Sox’ bullpen on Friday.

Castro will compete in spring training for a spot in Houston’s season-opening bullpen after being cut loose back in August by the Diamondbacks after missing most of last year due to shoulder inflammation. The 30-year-old righty made 75 relief appearances the previous season for Arizona. He holds a serviceable 4.20 ERA, 1.38 WHIP and 410/233 K/BB ratio across 460 2/3 innings (419 appearances) in the big leagues dating back to 2015. He’ll presumably operate in middle relief for the Astros if he gets back to the majors.

Castro was cut loose back in August by the Diamondbacks after missing most of last year due to shoulder inflammation. The 30-year-old righty made 75 relief appearances the previous season for Arizona. He holds a serviceable 4.20 ERA, 1.38 WHIP and 410/233 K/BB ratio across 460 2/3 innings (419 appearances) in the big leagues dating back to 2015. He’ll presumably operate in middle relief for Houston.